New biometric fingerprint scanner from DigitalPersona that doubles as a scroll wheel for navigation. The U.are.U Firefly, as it’s called, is smaller than a 9-volt battery and has optical sensors that can scan a user’s finger as its being turned built-into a roller-style wheel rather than a flat pane of glass like most fingerprint scanners. Should start showing up early next year in mobile devices like cellphones, PDAs, and laptops where space is at a premium.
